Having looked at some of these, I can say two things. First, creating games is complicated. A lot more complicated than creating web pages or even videos. And second, even though it's less complicated with these tools, if you want to do anything more involved than simply quiz and response, it's still complicated. You have to invest some time and effort to figure out what you're doing. That said, sites like this put a lot of functionality into the hands of people who would otherwise have had to invest a lot in authoring software. So on balance, I certainly welcome their appearance.